Automatic stop for phonographs



Sept. 18,1923. 1,468,279

G. T. CHERINGTON AUTOMATIC STOP FOR PHONOGRAPHS Filed May 26. 1920 Patented Sept. 1S, 1923.

Unirse, -s'rresinane. eer-,a ai or ai ce.

GEORGE T, CHER-INGTN, OF WAUKEGAN, ILLINOIS.

AoToMATIo smorron rHoNoGnAPHs.

application flied nay 26, 1920.` serial No. 384,316] 5 To all @chomz'z may con-cern.'

Beit known that/, GEORGE T. @HERING- Tonf, a citizen of the United States, and resident of Vaukegan, county of Lake, and

State of` Illinois, have invented a certain newjand useful Improvement in Automatic Stops for Pphonographs, of which the following is a specification. d l

My invention relates to thatV class of pho# nographs jwhich use a atirecord which rests upon a turn table, and has for its object to provide a new andV improvedstop' for the before it is finished playing, and other times i it does not stop at all. Y

My invention when applied to a phonograph, insures the complete playing of every record, and also the stopping of further. ro-v tation of the turn table 4when the, playing is linished. A Y i My improved means of covering the turn table is designed t0 avoid Vthe necessity'ot gluing the felt which is usually employed for a cover, to Athe top of thegturn table it generally' beingthe case that this felt only extends to the'top. l'

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings which are hereunto annexed andare a part oi' this specification, in which- !"g l, is a fragmentary view, partly in sei-lion, of a top of a turn table cabinet,

showing my improvement.

Fig. 2 is a top orr plan view of the device portions of the record and turn table,-bemg broken away to more clearly show the int-ei'ior construction.

Fig. El is a fragmentary detail View of the trigger. i

shown in the drawings, the motor hoard l is provided with an opening through which passes the turn table shaft 2which c-arriesfthe turntable 3.,*ri`lie toneparm 4 carries the usual 'reproducer or sound box usual land customary manner. l ,i

Mountedy upon the lower side 'of the turn tablerand concentric'A therewith is a disk 7.V As illustratethit iSsecuredto the turn table by means of rivetsy 8. This disk 7 vis proto which. is' secured the needle 6 inthe vided.` with' 'il peripheral lflange 9 which de- ,n Ypend'sdownwardly therefrom.

Mounted "upon the'` mot-or board 1 is a pivot* 10v which' may be 'secured i'n place by any suitable orconvenientr means. Upon the pivot' 1Q is oscillatively'mounted aV .trigger 11, one end 12 of'whicli extends beyond the periphery' of thefturn table 3; the otherend is .providedwith twol lugs' 1'3 and 14 which are so arranged thatvwhen the'openingl in the ltrigger 11 is mounted onthe' pivot 10, Y

the lug `13l will be within the downwardly depending peripherallange'ti, and the other lug 14 will be withoutfsai'd flange.,

i In the lugs 13 and V14VV are mountedpins, 16 and 1'( which carry rollers 18 and ,19

preferably formed* of felt, which --act 'as brake-shoes; as will behereinafter set forth A rod120 isffixedly attached ,to'rthe tone i arm 4 and ismovab'le therewith,` Itwneces-v Y sarily follows, therefore, thatrwhen the tone arm'swmgs upon nits center, that the .rod 20 against the edge of the trigger 11 serving to hold it normallv in the position shown in- Fig'. l, so thatthe turn table is free to rotate unless the trigger is moved to the osition indicated by the dotted lines in Fig. 2.

Adjacent the screw 22 Imount a pin 23 which serves as a fulcrum over which the spring 21 is bent by the trigger as it swings Y upon the pivot 10 when the rod 2O on the tone arm 4 contacts with the end 12.

It may be found desirable in practice to supply a detent 24 mounted in the motor board to prevent the trigger from swinging toe far in the opposite direction, when'the tone arm is swung to the position shown in '35i will Vbe brought into contactl with the-end 12 the trigger unless the needle moves beyond the edge of the medallion inthe center of the record. In order for this to occur, l provide a template with a scroll orfrench curve edge. This template is provided with an l opening Vwhich is fitted to and coincides with the size. of the turn table shaft 2, so that when the record is in position the template may beplaced on the record and a groove formed in the record by following the edge of the template with a sharp instrument, with the-result that when the record travels inwardly to thevedge of the medallion, it will then pass in on the scroll 25 as shown in F ig. 1, until it reaches point 26, in which case it will occupy the position as shown in the dotted lines in the said figure, when the trigger will have been swung to oneside on itspivot and the shoes 18 and 19 are caused to, exert a bralrino' power against the further rotation' of the turn table.

It will bev obvious fromv the foregoing description thatin this way it is impossible for the automatic stop to operate until the record has finished playing. Furthermore, that it cannot continue to rotate after the needle reaches the point 26 o-n the scroll 25 without the rod 20 actuating the end 12 of the trigger 11, and bringing the machineto a full stop, thus entirely ,eliminatingy the human equation insofar as theV stopping of the machine is concerned. f i

Having described my invention what l regard 'as newanddesire to secure by Letters Patent is: 1. The combination with a phonograph having a motorV board, a tone arm, reproducer andneedle therefor, and a turntable, of a member secured to the underside of said turn table, a peripheral flange on said member, a record having a spiral groove extending from the inner groove of the playing grooves to a point adjacent the center of saidrecord, a pivoted trigger mounted on the motor board'adjacent Vthe periphery of saidfiange, brake-shoes mounted on said trigger on each side of said flange, a fixed member secured tothe tone arm, which engages the trigger when the needle is adjacent the "center of the record, .and thus causes the brake-,shoes to engage the liange.

2j rlhe combination with a phonographf having a motor board, a vtone arm, reproducerand needle therefor, and a turn table, of a member secured tothe underside of said turn table, a peripheral flange on saidmember, a. record having a spiral groove extend.-

ing from .the inner 'groove of the playing grooves to a pointv adjacent the center of said record, `a pivoted trigger mounted lon theV motor board adjacent the periphery of sa1d` flange, brake-shoes mounted on saidtrigger j on each side of said flange, a fixed member secured to the tone arm, which engages theV trigger when the needle is adjacent the center of the record, and thus causes the brake-shoes to engage the fiange, and Va spring to hold said shoes normally out of engagement with said flange.

3. The combination with a phonograph having amotor board, a tone arm, repro` ducer and needle therefor, and a turntable,

of a. member to be gripped, means to grip said member on two sides of the memberA to be gripped, and means secured to thetone arm to cause the saidV gripping `means to operate when the needle'travels to a point inside of the playing grooves. i

'In testimony whereof, I have signed the foregoing specification.

'Geenen rr. oHERiNe'roN. 

